User interface for a portion of a display screen



FIG. 1 is a front view of a user interface for a portion of a displayscreen showing my new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line drawing of a portion of a display screen is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a user interface for a portion of a displayscreen, as shown and described.